/// <summary>
/// Creates a lock with name <paramref name="lockName"/>, using the given
/// <paramref name="connectionString"/> to connect to the database via the strategy
/// specified by <paramref name="connectionStrategy"/>
/// </summary>
public SqlDistributedLock(string lockName, string connectionString, SqlDistributedLockConnectionStrategy connectionStrategy)
: this(lockName, CreateInternalLock(lockName, connectionString, connectionStrategy))
{
if (string.IsNullOrEmpty(connectionString))
{
throw new ArgumentNullException("connectionString");
}
}
internal static IInternalSqlDistributedLock CreateInternalLock(string lockName, string connectionString, SqlDistributedLockConnectionStrategy connectionStrategy)
{
switch (connectionStrategy)
{
case SqlDistributedLockConnectionStrategy.Default:
case SqlDistributedLockConnectionStrategy.Connection:
return(new OwnedConnectionDistributedLock(lockName: lockName, connectionString: connectionString));
case SqlDistributedLockConnectionStrategy.Transaction:
return(new OwnedTransactionSqlDistributedLock(lockName: lockName, connectionString: connectionString));
case SqlDistributedLockConnectionStrategy.OptimisticConnectionMultiplexing:
return(new OptimisticConnectionMultiplexingSqlDistributedLock(lockName: lockName, connectionString: connectionString));
case SqlDistributedLockConnectionStrategy.Azure:
return(new AzureSqlDistributedLock(lockName: lockName, connectionString: connectionString));
default:
throw new ArgumentException(nameof(connectionStrategy));
}
}
/// <summary>
/// Creates a semaphore with name <paramref name="semaphoreName"/> that can be acquired up to <paramref name="maxCount"/>
/// times concurrently. Uses the given <paramref name="connectionString"/> to connect to the database via the strategy
/// specified by <paramref name="connectionStrategy"/>
/// </summary>
public SqlDistributedSemaphore(string semaphoreName, int maxCount, string connectionString, SqlDistributedLockConnectionStrategy connectionStrategy)
: this(semaphoreName, maxCount, name => SqlDistributedLock.CreateInternalLock(name, connectionString, connectionStrategy))
{
if (string.IsNullOrEmpty(connectionString))
{
throw new ArgumentNullException(nameof(connectionString));
}
}
